Kudos Microsoft Support!!!
I recently called your tech support after my disc drive was corrupted by the May update. I was very upfront with the rep and told him that I bought my console used, and that I had opened it to remove dust, this voiding the warranty. He was extremely efficient and patient as I gathered details on my system. I was informed that I would be receiving a pre-paid UPS box to send my old console back. The box never arrived, but I did get an e-mail that I would be getting a new XBOX 360 S 250GB to replace my September/07 Pro. I was worried maybe this was some kind of mistake but sure enough it arrived yesterday, along with a voucher for 12 months of LIVE, even a transfer cable.
I have to say I am exceedingly impressed with Microsoft and the whole XBOX support team. You have a loyal customer for life!!
I have seen some rumours flying around the net that Microsoft is not replacing consoles affected by this issue not true! If your disc drive has been acting funny since mid-May call support! 1-800-4MY-XBOX